visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2017-11-03 16:00 
연사  
장소 #1323 (1st fl., E6-2.) 

The seminal work of Anderson triggered a great deal of theoretical and experimental efforts to search for the novel quantum spin liquid (QSL) states in matters, and it has become one of central issues in contemporary condensed matter physics. The QSL state, a long-range quantum entangled state, is represented by a topological order and fractionalization of constituent magnetic moments. While the most QSL states have been described by deconfined spinons as an elementary excitation in frustrated magnets, Kitaev’s QSL state is exactly derived by fractionalizing the spin excitation into Majorana fermions in a two-dimensional honeycomb lattice, the so-called Kitaev lattice, with the ansatz of bond dependent Ising-like spin interaction. In the past decade, experimental realization of the fascinating Kitaev honeycomb QSL model has been eagerly pursued. In this talk, I will present the experimental evidences of fractionalized Majorana fermions in a high quality α-RuCl3 single crystal. Neutron and x-ray diffraction measurements reveal that the low-temperature crystal structure forms the perfect Ru-honeycomb lattice, which provides an ideal platform for the Kitaev honeycomb quantum spin lattice. Extensive thermodynamic and neutron spectroscopic measurements directly proved fractionalized Majorana fermion excitations as a result of thermal fractionalization of Jeff = ½ pseudospins, which is well reproduces by numerical predictions obtained from the Kitaev model.

 

20171103_지성대.pdf

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
345 2023-10-11 16:00    [CAPP seminar] Particle Physics with Neutrinos file
344 2018-07-09 14:00    The principles of collective learning file
343 2023-06-01 16:00    Hall viscosity and topological phenomena
342 2021-03-25 16:00    Search for dark matter axion with Rydberg atoms file
341 2016-08-04 14:30    Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
340 2022-03-25 11:00    (응집물리 세미나) Hund's metallicity in ruthenate systems file
339 2024-05-28 11:00    동적평균장 이론 소개
338 2019-08-22 16:00    Physics and Applications in Nanoelectronics and Nonomechanics file
337 2020-12-09 10:00    Searching for the QCD axion with the ARIADNE experiment file
336 2025-04-21 16:00  Prof. Ambrose Sungseok Seo (Univ of Kentucky)  Condensed matter physics? All you gotta do is just meet me at the ... file
335 2022-08-08 14:00    Classical Shadow Tomography for Analog Quantum Simulators
334 2022-09-21 10:30    [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file
333 2019-08-19 10:00    Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
332 2016-10-17 11:00    IMS and examples of the studies on optoelectronic materials
331 2024-04-11 16:00    Theoretical Studies of the Electric Field Induced Thermal Hall Effect in the Quantum Dimer Magnets XCuCl3 (X = Tl, K)
330 2020-11-26 16:00    2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
329 2024-01-24 15:00    Determination of single molecule loading rate during mechanotransduction file
328 2020-12-11 14:30    Antisymmetric interlayer exchange coupling in magnetic multilayers
327 2025-05-13 16:00  Mr. Heonjoon Park(Univ. Washington, USA)  Fractional Quantum Anomalous Hall Effect file
326 2023-01-09 16:00    Non-Hermitian Hopf-bundle Matter. Moon Jip Park (IBS-PCS)